[mirror_ubuntu-artful-kernel.git] / include / asm-avr32 / thread_info.h

/*
 * Copyright (C) 2004-2006 Atmel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __ASM_AVR32_THREAD_INFO_H
#define __ASM_AVR32_THREAD_INFO_H

#include <asm/page.h>

#define THREAD_SIZE_ORDER	1
#define THREAD_SIZE		(PAGE_SIZE << THREAD_SIZE_ORDER)

#ifndef __ASSEMBLY__
#include <asm/types.h>

struct task_struct;
struct exec_domain;

struct thread_info {
	struct task_struct	*task;		/* main task structure */
	struct exec_domain	*exec_domain;	/* execution domain */
	unsigned long		flags;		/* low level flags */
	__u32			cpu;
	__s32			preempt_count;	/* 0 => preemptable, <0 => BUG */
	struct restart_block	restart_block;
	__u8			supervisor_stack[0];
};

#define INIT_THREAD_INFO(tsk)						\
{									\
	.task		= &tsk,						\
	.exec_domain	= &default_exec_domain,				\
	.flags		= 0,						\
	.cpu		= 0,						\
	.preempt_count	= 1,						\
	.restart_block	= {						\
		.fn	= do_no_restart_syscall				\
	}								\
}

#define init_thread_info	(init_thread_union.thread_info)
#define init_stack		(init_thread_union.stack)

/*
 * Get the thread information struct from C.
 * We do the usual trick and use the lower end of the stack for this
 */
static inline struct thread_info *current_thread_info(void)
{
	unsigned long addr = ~(THREAD_SIZE - 1);

	asm("and %0, sp" : "=r"(addr) : "0"(addr));
	return (struct thread_info *)addr;
}

/* thread information allocation */
#define alloc_thread_info(ti) \
	((struct thread_info *) __get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER))
#define free_thread_info(ti) free_pages((unsigned long)(ti), 1)
#define get_thread_info(ti) get_task_struct((ti)->task)
#define put_thread_info(ti) put_task_struct((ti)->task)

#endif /* !__ASSEMBLY__ */

#define PREEMPT_ACTIVE		0x40000000

/*
 * Thread information flags
 * - these are process state flags that various assembly files may need to access
 * - pending work-to-be-done flags are in LSW
 * - other flags in MSW
 */
#define TIF_SYSCALL_TRACE       0       /* syscall trace active */
#define TIF_NOTIFY_RESUME       1       /* resumption notification requested */
#define TIF_SIGPENDING          2       /* signal pending */
#define TIF_NEED_RESCHED        3       /* rescheduling necessary */
#define TIF_POLLING_NRFLAG      4       /* true if poll_idle() is polling
					   TIF_NEED_RESCHED */
#define TIF_BREAKPOINT		5	/* true if we should break after return */
#define TIF_SINGLE_STEP		6	/* single step after next break */
#define TIF_MEMDIE		7
#define TIF_RESTORE_SIGMASK	8	/* restore signal mask in do_signal */
#define TIF_USERSPACE		31      /* true if FS sets userspace */

#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
#define _TIF_BREAKPOINT		(1 << TIF_BREAKPOINT)
#define _TIF_SINGLE_STEP	(1 << TIF_SINGLE_STEP)
#define _TIF_MEMDIE		(1 << TIF_MEMDIE)
#define _TIF_RESTORE_SIGMASK	(1 << TIF_RESTORE_SIGMASK)

/* XXX: These two masks must never span more than 16 bits! */
/* work to do on interrupt/exception return */
#define _TIF_WORK_MASK		0x0000013e
/* work to do on any return to userspace */
#define _TIF_ALLWORK_MASK	0x0000013f
/* work to do on return from debug mode */
#define _TIF_DBGWORK_MASK	0x0000017e

#endif /* __ASM_AVR32_THREAD_INFO_H */
Commit	Line	Data
5f97f7f9 HS	1	/*
	2	* Copyright (C) 2004-2006 Atmel Corporation
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*/
	8	#ifndef __ASM_AVR32_THREAD_INFO_H
	9	#define __ASM_AVR32_THREAD_INFO_H
	10
	11	#include <asm/page.h>
	12
	13	#define THREAD_SIZE_ORDER 1
	14	#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
	15
	16	#ifndef __ASSEMBLY__
	17	#include <asm/types.h>
	18
	19	struct task_struct;
	20	struct exec_domain;
	21
	22	struct thread_info {
	23	struct task_struct task; / main task structure */
	24	struct exec_domain exec_domain; / execution domain */
	25	unsigned long flags; /* low level flags */
	26	__u32 cpu;
	27	__s32 preempt_count; /* 0 => preemptable, <0 => BUG */
	28	struct restart_block restart_block;
	29	__u8 supervisor_stack[0];
	30	};
	31
	32	#define INIT_THREAD_INFO(tsk) \
	33	{ \
	34	.task = &tsk, \
	35	.exec_domain = &default_exec_domain, \
	36	.flags = 0, \
	37	.cpu = 0, \
	38	.preempt_count = 1, \
	39	.restart_block = { \
	40	.fn = do_no_restart_syscall \
	41	} \
	42	}
	43
	44	#define init_thread_info (init_thread_union.thread_info)
	45	#define init_stack (init_thread_union.stack)
	46
	47	/*
	48	* Get the thread information struct from C.
	49	* We do the usual trick and use the lower end of the stack for this
	50	*/
	51	static inline struct thread_info *current_thread_info(void)
	52	{
	53	unsigned long addr = ~(THREAD_SIZE - 1);
	54
	55	asm("and %0, sp" : "=r"(addr) : "0"(addr));
	56	return (struct thread_info *)addr;
	57	}
	58
	59	/* thread information allocation */
	60	#define alloc_thread_info(ti) \
	61	((struct thread_info *) __get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER))
	62	#define free_thread_info(ti) free_pages((unsigned long)(ti), 1)
	63	#define get_thread_info(ti) get_task_struct((ti)->task)
	64	#define put_thread_info(ti) put_task_struct((ti)->task)
65
66	#endif /* !__ASSEMBLY__ */
67
68	#define PREEMPT_ACTIVE 0x40000000
69
70	/*
71	* Thread information flags
72	* - these are process state flags that various assembly files may need to access
73	* - pending work-to-be-done flags are in LSW
74	* - other flags in MSW
75	*/
76	#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
77	#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
78	#define TIF_SIGPENDING 2 /* signal pending */
79	#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
80	#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
81	TIF_NEED_RESCHED */
82	#define TIF_BREAKPOINT 5 /* true if we should break after return */
83	#define TIF_SINGLE_STEP 6 /* single step after next break */
84	#define TIF_MEMDIE 7
85	#define TIF_RESTORE_SIGMASK 8 /* restore signal mask in do_signal */
86	#define TIF_USERSPACE 31 /* true if FS sets userspace */
87
88	#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
89	#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
90	#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
91	#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
92	#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
93	#define _TIF_BREAKPOINT (1 << TIF_BREAKPOINT)
94	#define _TIF_SINGLE_STEP (1 << TIF_SINGLE_STEP)
95	#define _TIF_MEMDIE (1 << TIF_MEMDIE)
96	#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
97
98	/* XXX: These two masks must never span more than 16 bits! */
99	/* work to do on interrupt/exception return */
100	#define _TIF_WORK_MASK 0x0000013e
101	/* work to do on any return to userspace */
102	#define _TIF_ALLWORK_MASK 0x0000013f
103	/* work to do on return from debug mode */
104	#define _TIF_DBGWORK_MASK 0x0000017e
105
106	#endif /* __ASM_AVR32_THREAD_INFO_H */